Flow regulator



FIG. 1 is a top perspective view of a flow regulator showing my new design;

FIG. 2 is an elevational view thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof, wherein the dashed lines show environmental matter for illustrative purposes only and do not form part of the claimed design. 

The ornamental design for a flow regulator, as shown and described. 